As the new baby’s royal siblings arrived to meet him for the first time, Prince George left the car looking visibly nervous but his little sister Princess Charlotte was beaming and gave everyone outside the hospital a wave.

This now famous wave from Princess Charlotte almost took all the attention away from her new sibling as people around the world gushed over the little royal.

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However, with all the buzz around the third royal baby and Princess Charlotte’s wave you might have also missed a simply adorable sibling moment between Prince George and Princess Charlotte.

Footage from the day shows Prince George and Princess Charlotte being led into the doors of St Mary’s hospital by their dad. Once in the building Prince William steps out of the way and Prince George, now more relaxed with his back to all the cameras, puts his arm around little sister Charlotte.

Lots of people who were watching the live coverage unfold commented on the moment on social media.

One person tweeted: ‘I think George puts his arm around Charlotte when they’re inside 😍’.

Another said: ‘Omg I saw this earlier, I died! Literally the cutest thing I have ever seen 😍😍’.

While a third wrote: ‘Omg they are so cute, congratulations to u both becoming a big brother and sister 💙❤’.

Other Twitter users have joked that perhaps the moment isn’t as cute as we think and is in fact Prince George giving his sister a little tap on the head – a classic sibling provocation that any parent will recognise!

One person wrote: ‘🤣that is definitely Prince George FLICKING the back of Princess Charlotte’s head as they enter the Lindo Wing’.